Pattern copying machine



Feb. 16, 1932. G. F. RYAN 1,844,981

PATTERN GQPYING MACHINE Filed June 20, 1929 5 Sheets-Sheet l Fig.1.

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Feb. 16, 11932.

Filed June 20, 1929 5 Sheets-Sheet 2 Fig. 2.

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Feb. 16, 1932. G.,F. RYAN PATTERN COPYING MACHINE Filed June 20, 1929 5 Sheets-Sheet 5 I X 1 I 5:?

Feb. 16, 1932 G. F. RYAN PATTERN COPYING MACHINE Filed June 20, 1929 5 Sheets-Sheet 4 :Feb. .16, 1932. G. F. RYAN PATTERN COPYING MACHINE Filed June 20, 1929 5 Sheets-Sheet 5 Patented Feb. 16, 1932 warren STATES PATENT OFFICE GEORGE F. RYAN, OF LYNN, MASSACHUSETTS, ASSIGNOR, BY MiESNE ASSIGNMENTS, TO

UNITED SHOE MACHINERY CORPORATION, OF PATEB'SON, NEW JERSEY, A COR- PORATION OF NEW JERSEY PATTERN COPYING MACHINE Application filed June 20,

' thereby intended to restrict the scope of the claims to pattern copying machinery of this type, as some of its principles may be applicable to the entire class of pattern copying machinery including the production, of objects having less than three dimensions, such,

' example, as patterns for soles, shoe uppers, clothing, etc. I have therefore in many of the claims used words and terms in a generic sense as applying to the broad class of machinery of the pattern reproducing type.

It is well known that width grading mechanisms of last lathes of the type set forth in said Letters Patent have been substantially pantographic in their action, multiplying all perpendicular distances from a grading axis (which, in a last lathe, is the axis of rotation of the model) tovthe surface of the model by a factor constant throughoutthe turning. From this pantographic action there arose in the use of last lathes of the type referred to a problem of considerable importance.

In such last lathes, the model is suspended on centers engaging its heel and toe tip, and in cutting lasts wider than the model the toe spring, which is the vertical distance between the bottom of the ball and the end of the tee, is increased progressively as the last being cut becomes wider. For instance, the 1B model is 7 inches in perimeter at the ball. The lEE last is 8 inches in perimeter,

and therefore about inch greater in thickness, this point. Since the axis of rotation passes through the ball portion near the top of the last, the greater part of this 14; inch is added on the bottom of the last, that is, the last dropsbelow the model at this point by nearly ,4; inch. This causes a certain variation in the bottom profile of the last as compared with that of the model. The end of the toe,.being on the axis of rotation, does not drop at all, the heel drops a certain 1929. Serial No.s72,s14.

amount and the ball drops (absolutely) more than any other point since it is farther below the axis than any other point. A distinct downward bend'in the bottom profile thus results, on the whole, from the widening. This isespecially noticeable in the forepart, giving rise, as stated, to an exaggerated toe spring or distance from the floor line to the toe tip. The reverse diiiiculty occurs in the case of lasts narrower than the model.

Such variations in lasts cause differences in appearance of the shoes of a set of the same style, and prejudice their merchandising value. The problem has been dealt with in the past by slotting and bending the lasts of faulty appearance by hand in order to secure the desired bottom profile, so that all shoes of a set will have (for example) the same heel height and toe spring. This socalled hand-breaking is a purely empirical matter, cannot be elfected twice exactly alike, and is expensive. I I I This problem of mechanically producing a desired bottom profile in a last laterally graded larger or smaller than the model was successfully solved by the inventions of L. B. lVhipple (U. S. Letters Patent No. 1,362,183, granted December 14, 1920) of S. E. Boynton (U. S. Letters Patent No. 1,362,185, granted December 14-, 1920) and of Ryan & Burke, U. S. Letters Patent No. 1,733,207, granted October 29, 1929); by the use of which inventions the bottom profile iscontrolled by shifting the model (or work block) dogs up or down on their mechanical axes of rotation during the last cutting.

The underlying theory of these inventions will be found fully explained in the Letters Patent referred to. It may be briefly statedas follows. p y

The ordinary last lathe comprises a model wheel and cutter, against which rotates a model and a block wliichare suspended in a pendulum-like swing frame. The model rests against the model wheel and thus controls the fall of the block toward the cutter and hence the depth of cut of the cutter- The model wheelandcutter are slowly traversed along the model and block from one end to the other, so that each Works around its mechanical axis of rotation.

the model or block in a spiral, any one loop of which, corresponding to one revolution of the model or block, may be regarded as a lamina. So-called len th and width graders are provided to magnify or reduce the model longitudinally and transversely, in the block.

1f the model be gradually raised heightwise, relatively to its mechanical axis of rotation, it will hold the swing frame progressively farther and farther from the model wheel when the upper side of the model is in contact with the wheel, and allow it to swing progressively farther and farther in toward the wheel when the tread face of the model is in contact with the wheel. This, in efiect, reproduces the parallel transverse lamiIltB, into which the model can be regarded as divided, in progressively shifted positions relatively to one another in the block, and thus the bottom profile of the last cut can be controlled. The procedure given above, by way of example, would increase the toe spring which would be produced by an ordinary last lathe in the same grading adjustment.

In view of the foregoing, it is an object of the present invention. to provide a pattern copying machine specially designed for last turning, which will be as successful in solving the toe problem above analyzed as the machines disclosed in the Letters Patent referred to, and which will at the same time be further simplified and otherwise improved.

An importantfeature of the invention resides in mechanism for shifting the model (as herein shown, though the desired effect can be produced by properly moving one of the other primary instrumentalities of the lathe, block, cutter or model wheel) which mechanism is in continual movement of considerable magnitude as compared with the movement produced by it in the model or other rimary instrumentality, so that there shall be no opportunity for the slowly shifting model to stick and jerk. By the term shifting as used herein is meant a displacement of the dog toward or from its axis of rotation while the machine is in actual operation. In the illustrated machine this is accomplished by moving the model dog under consideration by the operation of two slides crossed at right angles which are given simple harmonic motions differin g 90, or a quarter period, in phase. This effects the required circular revolution of the dog about The amplitude of the simple harmonic motions is gradually changed as the model wheel moves along the model length, thus varying the radius of revolution of the dog around its mechanical axis of rotation, and cumulatively varying the total dog shift as desired.

These and other features of the invention comprising certain combinations and arrangements of parts will be apparent from the following description of a preferred embodiment of the invention shown in the drawings, in which Fig. 1 is a front elevation;

Fig. 2 is an enlarged detail perspective of the dog shifting means;

Fig. 3 is a side elevation of the dog shifting means;

Fig. 4 is a fragmentary plan of part of the dog shifting means;

Figs. 5 and 6 are vertical sections of the dog shifting means;

Figs. 7, 8, 9 and 10 are details showing diffeigfnt positions of the dog shifting means; an

Fig. 11 illustrates the shifting movement of the model.

The main frame 10 of the illustrated ma chine is of ordinary formation and carries two standards 12, 14 at the upper ends of which is piy oted the swing frame 16, as is well understood. The lower end of the swing frame is formed by two bars 18, 20 which carry the model and block holding and operating means. The three castings 22, 24, 26 are mounted to extend between the bars 18, 20 and the castin 22 carries the operating means for the model heel dog 28. The casting 24 carries similar means for operating the model toe dog 30 and also the means for rotating the block heel dog 32, while the casting 26 which is easily adjustable along the bars 18, 20 to accommodate blocks of different lengths carries the block toe dog 34. The model and block are rotated by power transmitted into the swing frame through a pulley 36 on a shaft 38 which carries equal pinions 40, 42. These pinions mesh with equal pinions 44 and 46 mounted upon the mechanical axes of rotation of the model and block respectively. The model heel dog 28 and the model toe dog 30 are operated by exactly similar mechanisms and a description of one of them will suffice.

The gear 44 (see Fig. 2) is integral with a shaft 48 which is mounted to rotate in a bearing in the casting 22 and carries on its right-hand end, as seen in Figs. 1 and 2, a head 50 which has a dovetailed slot 52 arranged arallel to the vertical dimension of the mo e1 heel dog 28. In the slot 52 is a correspondingly dovetailed slide 54 having adovetailed slot 56 arranged at right angles to the slot 52. In the slot 56 is mounted a correspondingly dovetailed slide 58 on which is fixedly mounted a spindle 60 on which is keyed the model heel (log 28. It is obvious that the slides 54 and 58 permit the spindle 60 to be moved freely in all directions, keeping it parallel to itself, and it is likewise clear that if the spindle 60 is held in any position, whether coaxial with the spindle 48 or not, the two slides will cause it to rotate with the spindle 48 at all times with the same angular velocity as that of the spindle 48. The spindle 48 may be called the mechanical axis of rotation or revolution of The spindle extends through a holein a vertical slide 62 which works in a dovetailed slot 64 in a horizontal slioe 66 which in turn works in a horizontal dovetailed slide 68 (Fig. 6) in the casting 22. Thus, the l'1orizontal movement of the slide 66 is communicated to the spindle and any vertical movement of the slide 62 is communicated directly to the spindle 60. Thus, these slides 62 and 66 determine the position ofthe spindle 60. The slide 62 is moved up and down in its sli'deway 64 by pin 70 which worksin a slot "71 in the slide 62 and is ino'unted'on a block 72 which moves freely in a dovetailed slot 74 in a crank arm '3 6 mounted on a spindle i 8.

The spindle 78 is freely rotatable in a hous-' ing 80 which is integral with the casting 22. The crank arm 7 6 and spindle 78 are rocked back and forth by an arm 82 integral with thespindle 7 8 and pivoted to an eccentric strap 84 which surrounds an eccentric 85 (Fig. 6). mounted on the spindle 48; Thus, as the spindle 48 revolves the eccentric and its strap rock the crank arm 82, the spindle 78 and its integral arm 76, and if" the pin 70 is anywhere in the slot 74 except in alinement with the spindle 7 8 it is clear that it will move the slide 62 up and down, the cycle of movement of the slide corresponding to the rotation cycle of the spindle 48." The slide 66 is moved his. similar manner by a pin 86 which works'in a slot 88 in the slide 66 and is mounted on a block 90 which slides freely in a dovetailed slot in a crank arm 92 mounted on a shaft 93 (Figs. 5 and 8) mounted in the casting 22 like the spindle 78. On this shaft 93 is mounted a crank arm 94 pivoted to an eccentric strap 96 which engages the eccentric 85 on the spindle 48. These two eccentric straps 84 and 96 are 90 apart on the eccentric 85, in the illustrated machine.

Thus, it is clear that when the machine is running it the pins 70 and86 are not coaxial with the spindles '1" 8 and 93 respectively, the eccentric straps 84 and 96 by rocking the arms '3 6 and 92 will move the slides 62 and 66, thereby moving the spindle 60 of the model heel dog 28. The motions of the pins 70 and 86 are substantially simple harmonic motions at right angles to eachother and difi'ering 90? in phase( that is,each pin is the extreme point of its movementwhen theother s at its mean point) and such *ill be the mo- LlQTlS i the slides 62 and 66. The spindle 60 is therefore given a stantially the sum or two simple harmonic motions differing 90 in phase and the resulting movem nt will be. a circle provided the pins '70 and 86 are 05 the center of rotation of the arms 7 6 and 92 by the samefamount slide 62 and consequently tothe movementwhich is sub which will be seen to be the case in the illustrated machine.

The positions of the pins 70 and '86 are controlled as follows. The pins extend through slots 98 and 100 intwo arms of a spider 102 which is freely rotatable on the spindle 48. The slots 98 and 100, as shown, are at right angles to each other and that arm in which the slot 100 is formed is somewhat e'Xtended to receive a pin 104 through which rotational movement is communicated to the spider 102 as will he shown. The distances of the axes of oscillation of the arms 76 and 92 from the spindle to which these arms are parallel, are equal in the illustrated ma chine and it is thus clear that any rotation ofthe, spider 102 by power transmitted to the pin 104 will move the pins ofi' the center ofoscillation of the arms 7 6 and 92, respectively, to the same amounts, thus causing the spindle 60 which carries he model heel dog 28 to revolve in a circle around the axis of the spindle 48 while it rotates upon its own axis once every revolution of the spindle 48 due to the slide arrangement 52, 54, 56, 58. The radius of the circle in which the spindle 60 revolves around the axis of the spindle 48 depends upon the displacement of the pins 70 and 86 from the centers of oscillation of the arms on which they are carried and this depends upon the position of the spider 102 and can be changed continuously.

The spider 102 is operated as follows. The pin 104 runs througha slot 106 in a link 108 which is connected to the end or" the spider 102 by a sp ing 110, the spring being amply strong enough to swing the spider, and herefore normally holding the pin 104 in the upper end of the slot. The slot 106 also carries alittle clamped dog 112 (Fig; 2) which can be adjusted'along a slot to limit the movement ofthe pin 104 in it when a positive connection is desired. At link 108 is another slot 114 with a'clamped dog 116 similar to dog 112 and the slot embraces a pin 118, in sliding member 120 which can be adjusted by a clamp screw 122 anywhere along an arc-shaped member 124 which is pivotal-1y mounted at 124 (Fig. 8) on the casting 22. of the member 124 is equal to the distance from. its pivotal point of support to the pin 104 when the spider 102 so adjusted that the pins 70 and 86 are at their dead centers, so that adjustment of the sliding block 120 at th t time will not move t spider. The pin 118 connec'tedto tl1-elink108 bya spring 125, which is strong enough to hold the pin 118 in the upper endof the slot 114 under operating conditions; The arc-shaped member 124 is joined by. rods 126, 128 to a similar member mounted in connection with the casting 24 and serving to operate the model toe dog'inechanism which, as stated, is exactly like that already described for the lower end of the The radius of curvature the heel dog. The rods 126 and 128 are connected by a bar 132 which is joined by a link 134-to an ear 136 on a slide 138 which is mounted to move back and forth perpendicularly to the bar 20. The car 136 carries a little cam roll 140 which moves in a slot 142 in an arm 144 on a bar 148 which is pivotally adjustable about a screw 150, the screw 150 being threaded into the bar 20. The slotted arm 144 has a circularly curved end 152, the center of curvature being at the axis of pivotal adjustment 150. The bar 148 is clamped in adjusted position upon a bar 153, which is pivotally mounted at 150, by a screw and slot at 154. The bar 153 is connected by a 'vot at 156 to an arm 157 which is connectccllo a slide 158 by a universal joint comprising aborizontal pivot 160 and a vertical pivot 162. as shown in Fig. 2. The slide 158 moves freely in a dovetailed slot 164 in the model wheel carriage 166. It is clear that as the swing frame swings in and out it will move the slide 158 in and out in its slot 164. As the model wheel carriage 166 is moved from right to left in Fig. 1, as is well understood in relation to machines of this type, it will swing the compound bar 148, 153 around the pivot 150 carrying the slotted arm 144 around with it in circular movement around the pin 150.

In using the illustrated machine it is contemplated that the model from the toe tip to the ball will be reproduced regularly in the block without any movement of the spindle 60 off center of the spindle 48. To this end, the arm 144 will be adjusted around its pivotal axis 150 at the beginning of the cutting in such a way that the cam roll 140 will reach the junction of the circular portion 152 of the slot with the straight portion 142 at the time the ball portion of the model and block are reached by the model wheel and cutter respectively. Prior to this time the circular part of the slot 152 will have swung around the center 150 and will not have moved the cam roll 140. After this time the swinging of the arm 144 around the center 150 will move the cam roll 140 forward toward the operator, thereby rocking the curved arm 124 clockwise as seen in Fig. 2. This rotation will take place continuously in the same direction until the end of the cutting at the heel of the last. The link 108 will be raised or lowered by this movement according to the adjustment of the member 120 along the member 124. Fig. 2 shows the member 120 in front of the pivotal axis of the member 124 so that the link 108 is raised by this movement. The spring 110 holds the pin 104 at the upper end of the slot 106 and as the link 108 is raised the spring pulls the spider 102 clockwise. This continues until it is desired to stop the gradual shifting movement of the spindle 60, that is, to stop the continuous augmentation of the radius of the circle in which it revolves around the axis of the spindle 48. This will be in general when the rear end of the shank portion of the last being cut is reached. \Vhen this point is reached the spider 102 will come up against a previously properly adjusted stop 168 and further movement of the link 108 will merely stretch the spring 110 as the slot- 106 rides upward alon the pin 104. In case the member 120 is adjusted to the other side of the ivotal axis of the arm 124 the link 108 will lie carried downward and the slot 114 and the spring 125 will operate in the same way as already described in connection with the corresponding members at the upper end of the link 108. In this case the spider 102 will come downward against a stop 170.

Fig. 7 shows the parts at the beginning of the dog shifting movement. when the model wheel has reached the ball of the model. The

model. indicated in broken lines, is in its normal position. The eccentric strap 84 and arm 76 are at the extremities of their throws and the eccentric strap 96 and arm 92 are in their mean positions. The cam roll 140 has just reached the inner end of the are 152, and the member 124 is just beginning to tip. The pins and 86 are on center.

Fig. 8 shows the parts at the end of the dog shifting movement, when the model wheel has reached the heel breast portion of the model. The link 108 has now been pulled down, displacing the spider 102 and the pins 70 and 86 from their neutral positions. The rock ing of the arms 76 and 92 has been operating the slides 62 and 66 and revolving the dogs around the axis of the shaft 48 as described. The eccentric 85 is shown 90 farther around than in Fig. 7. The shift of the model dogs is indicated by dotted lines on the shaft 48. 1

See also Fig. 11 where the normal and shifted positions of the model are shown in full and dotted lines respectively. The pin 118 is just about to begin to move downward in the slot 114, stretching the spring 125, since the spider 102 has come against the stop 170.

Figs. 9 and 10 show the parts when the cccentric has rotated 180 and 270 farther than as shown in Fig. 8.

It should be observed that the slides 62. 66 which control the dog 28 are in continual movement back and forth. Their mo ement is relatively great as compared with that of the dog carrying slides 54. 58 during any corresponding time. Indeed the amplitudes of the simple harmonic motions are equal to the diameter of the circle in which the dog 28 revolves, and hence are equal to twice the total dog shift which has accumulated at the time in question. Thus the liability of these slides sticking and jerking, owing to the endwise clamping pressure requisite to hold the model. is minimized. smoothness and reliability of action are thus secured.

The machine as shown in Figs. 7 to 11 is adjusted to raise the model relatively to its mechanical axis of rotation. Such a movement carried out between the ball and the heel, asis here contemplated, Will raise the heel relatively to the ball inthe work, and will accentuate the toe spring (or heel spring); This procedure adopted when grading down from a model,-where the nor mally produced toe spring would be too small.

Those parts of the-machine not specifically described hereinmay all be of ordinary construction. Such parts include the cutter carriage 168, length grading mechanism .170, Width grading mechanism 1'72, model wheel 174, and cutter 176. These parts all operate in. the well understood manner and further description of them is unnecessary.

It should be noticed that with the machine as illustrated,wit the amplitudes of the simple harmonic motions of the slides 62 and 66 equal and difiering 90 in phase, the slide 58 will never move. However, if this relation of the two motions of the slides 62, 66 is varied, as may be advisable for some purposes, the slide 58 will be necessary.

In the illustrated case the members 60, 58, 54 can 'e regarded as one integral member. The dog 28 is in effect integral with the mem ber 60, but is made removable for purposes of substitution.

Having described my invention, what I claim as new and desire to secure by Letters Patent ofthe United States is:

1. In a pattern copying machine, a model shitting means comprising a mechanical axis of rotation, a slide thereon and rotated thereby, a model holding means carried by .the slide and rotated thereby around the said mechanical axis, a member for, moving the slide to shift the model holding means relatively to the said mechanical axis of rotation, and mechanism constructed and arranged to impart to saic member movement transverse to the axis of rotation during a rotation of the said axis which is substantially, great as compared with the shifting movement of the model holding means during the said rotation. a

2. In pattern copying machine, a model shifting means comprising a mechanical axis oi rotation, a-slide thereon and rotated thereby, a model holding means carried by the slide and rotated thereby around the said Y mechanical axis, a member for moving the slide to shift the model holding means relatively to the said mechanical axis of rotation, and mechanic-1nconstructed and arranged to impart to said means continual movement transverse to the axis of rotation during a rotation of the said axis which is substantialas compared with the shifting movel e model holding means during the on. a 3. In a pattern copying machine, a model shifting means comprising a mechanical axis of rotation, a slide thereon and rotated thereby, a model holding means carried by the slide and rotated thereby around the said pared with the shifting movement of the.

model holding means during the said rotation.

i. In a pattern copying machine, a model shifting means comprising a mechanical axis or" rotation, a slide thereon and rotated there by, a 'model holding means carried by the slide and rotated thereby around the said mechanical axis, a member engaging the slide to shift the model holding means relatively to the axis of rotation, and mechanism constructed and arranged to impart to said member movement in a circuitous cycle relative to the model holding means during a rotation of the said axis which is substantially great as compared with the shifting movement of the model holding means during the said rotation, andmeans for varyingthe extent of said movement. I

5. In a pattern copying machine, a model shifting means comprising a mechanical axis of rotation, a slide thereon and rotated thereby, a model holding means carried by the slide and rotated thereby around the said mechanical axis, a member engaging the slide to shift the model holding means relatively to the axis of rotation, and mechanism constructed and arranged to impart to said member movementrelative to the axis of rotation in a closed circuit enclosing the model shifting movement during a rotation of the said .axis which is substantially great as compared with the shifting movement ofthe model holding means during the said rotation, and means for automatically varying the extent of said movement.

6. In a pattern copying machine, a model shifting means comprising a mechanical axis of rotation, a slide thereon and rotated there by, a model holding means mounted on the slide and rotated thereby around the said mechanical axis, a member engaging the model holding means for moving the same, mechanism constructed and arranged to impart to said member cyclic movement relative to the axis of rotation during a rotation of the said axis which is substantially great as compar d Withthe movement of the model holding means produced by said member during the rotation, and means for driving the memher from the said mechanical axis.

7. In a pattern copying machine, a dog shifting means comprising a mechanical axis member for moving the slide, mechanism constructed and arranged to impart to said member movement during a rotation of the said axis which is substantially greatas compared with the shifting movement of the dog during the rotation, and means for continuously driving the member in a cycle having the same period as that of the said mechanical axis.

8. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation for a dog, two cro sed slides for shifting the dog, and means for imparting oscillatory motions to the two crossed slides.

9. In a pattern copying machine, a dog shifting means con'iprising a. mechanical axis of rotation, a slide thereon, a dog carried by dire slide, an oscillating member for moving the slide, mechanism constructed and arranged to impart to said member movement during a rotation of the said axis which is substantially great as compared with the shitting movement of the dog duringtherotation, means for continuously driving the member in a cycle having the same. period as that of the said mechanical axis, and means for varying the amplitude of the said movementin'thesaid cycle.

10. In a pattern copying machine, adog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog carried by the 'slide, an oscillating member for moving the slide, mechanism constructed and arran ed to impart to said member movement during a rotation of the said axis which is substantially I great as compared with the shifting movement of: the dog during the retation,-means for continuously driving the member in a cycle having the same period as that of the said mechanical axis, and means for automatically varying the amplitude of the said movement in the said cycle.

11. In a pattern copying machine, a dog shifting means comprising a mechanical axis ofrotationpa slide thereon, a dog carried by the slide, an oscillating member for moving the slide, mechanism constructed and ar ranged to impart to said member movement during a rotation of the said axis which is sub stantially great as compared with the shifting movement of the dog during the rotation. and means for continuously driving the member in a cycle having the same; period as that of the said mechanical axis and having an amplitude substantially equal to twice the total dog shifting movement accumulated up to the time of the said revolution.

12. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation for the dog, a slide thereon, a dog mounted on the slide, two crossed slides for shifting the first-named slide, and means for imparting oscillatory motions to the two crossed slides.

- 13. In a pattern copying machine, a model shifting means comprising a mechanical axis of rotation for the model, two crossed slides one of which carries the model for moving the model, and means for imparting simple harmonic motions to the two crossed slides.

14. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog mounted on the slide, two crossed slides for moving the first-named slide, and means for imparting simple harmonic motions to the two crossed slides.

15. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation for a dog, two crossed slides for moving the dog, and means for imparting simple harmonic motions to the two crossed slides, said simple harmonic motions having periods equal to that of the rotation of the mechanical axis.

16. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog mounted on the slide, two crossed slides for moving the first-named slide, and means for imparting simple harmonic motions to the two crossed slides, said simple harmonic motions having periods equal to that of the rotation of the mechanical axis.

17. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog mounted on the slide, two crossed slides for moving the firstmamed slide, and means for imparting simple harmonic motions to the two crossed slides, said simple harmonic motions having periods equal to that of the rotation of the mechanical axis, and differing a quarter period in phase.

18. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog mounted on the slide, two crossed slides for moving the first-named slide, and means for imparting simple harmonic motions to the two crossed slides, said simple harmonic motions having periods equal to that of the rotation of the mechanical axis and having also the same amplitudes but differing a quarter period in phase.

19. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog mounted on the slide, two crossed slides for moving the first-named slide, means for imparting simple harmonic motions to the two crossed slides, said simple harmonic motions having periods equal to that of the rotation of the mechanical axis and having also the same amplitudes but differing a quarter period in phase, and means for varying the amplitudes during the production of a work piece.

20. In a pattern copying machine, a model rotating means, a model shifting means comprising a member constructed and arranged to shift the model and mechanism for in parting to said member simple harmonic motion having the same period as that of he model rotation.

21. In a pattern copying machine, a model rotating means, a model shifting means comprising a member constructed and arranged to shirt the model mechanism for im artin i P b to said member a simple harmonic motion havin the same cried as that oi the model 1 I rotation, and means for varying the amplitude of the simpleharmonic motion durlng the product-ion of a Work piece.

22. In a pattern copying machine, a dog shifting means comprislng a mechanical axisv of rotation, a slide thereon, a dog carried by the slide, a second slide mounted to oscillate transversely of the dog, a third slide mounted on the second to oscillate transversely thereof and of the dog, both of said last-named slides being rigidly connected to the axis of said dog as far as motion in their respective directions of oscillation is concerned, and means for driving the second and third slides with simple harmonicmotions.

23. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog carried by the slide, a second slide mounted to oscillate transversely of the dog, a third slide'mounted on the second to oscillate transverselythereof and of the dog, both or" said last-named slides being rigidly connected to the'axis of said dog as far as motion in their respective directions of oscillation is concerned, and means for oscillating the second and third slides.

24. In a pattern copying machine, a dog shifting means comprising a mechanical axis or rotation, a slide thereon, a dog carried by the slide,a second slide mounted tOOSCllllbG' transversely of the dog, a third slide mounted on the second to oscillate transversely thereot and of the dog, both of said last-namedslides,

bein ri idl connected to the axis oi said D c b u l p o a dog as iar as motion 1n their respective directions of oscillation is concerned, and means for driving the second and third slides with simple harmonic motions having equal amplitudes.

25, In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog carried by the slide, a second slide mounted to oscillate transversely of the dog, a third slide mounted on the second to oscillate transversely thereof and of the dog, both of said last-named slides being rigidly connected to the axis of said dog as far as motion in their respective directions of oscillation is concerned, means for driving the second and third slides with simple harmonic motions having equal amplitudes, and means for varying the amplitudes during the production of a Work piece.

26. In a pattern copying machine, a dog shifting means comprising a mechanicalaizis simple harmonic motions having equal am pl tudes but differing a quarter period in phase.

27. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog carried by the slide, a second slide mounted to oscillate transversely of the dog, a third slide mounted on thesecond to oscillate transversely thereof and of the dog, both of said las named slides being rigidly connected to the axis of said dog as far as motion in their respective directions of oscillation is concorned, and means for driving the second andthird slides ith simple harmonic mo-' tions havin equal amplitiides but diilering a quarter period 1n phase, the period of the said motions being equal to the rotation pe-- riod of the said mechanical axis.

28 In a pattern copying machine, a dog shitting means comprising a mechanical axis of rotation, a slide thereon, a dog carried by second slide arranged to oscilthe slide, a late transversely of the dog and to carry the dog with it in the direction of its oscilldtion, a third slide arranged to oscillate transversely of th dog and of the second slide, and to carry them With it in the direction of its oscillation, crank arms arranged to drive said means for driving the crank arms.

29; In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog carried by the slide, a second slide arranged to oscillate transversely of the dog andto carry the dog with it in the direction of its oscillation, a third slide arranged to oscillatetrans vcrsely of the dog and of the second slide, and to carry them With it in the direction of its oscillation, oscillating members arranged to drive said second and third slides respectively, and means for driving the oscillating members.

30. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog carried by the slide, a second slide arranged to oscillate transversely jot-the dog and to carry the dog with it in the direction of third slide arranged to oscillate transversely second and third slides respectively, and

of the dog and of the second slide, and to s oscillation, a

eccentric on the said mechanical axis for driving the crank arms.

31. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide theron, a dog carried by the slide, a second slide arranged to oscillate transversely of the dog and to carry the dog with it in the direction of its oscillation, a third slide arranged to oscillate transversely of the dog and of the second slide, and to carry them with it in the direction of its oscillation, crank arms arranged to drive said second and third slides respectively, and an eccentric on the said mecnanical axis for driving the crank arms at a phase difference of one quarter period.

32. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog carried by the slide, a second slide arranged to oscillate transversely of the dog and to carry the dog with it in the direction of its oscillation, a third slide arranged to oscillate transversely of the dog and of the second slide, and to carry them with it in the direction of its oscillation, and eccentric means for driving the second and third slides.

33. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog carried b the slide, a second slide arranged to escillate transversely of the dog and to carry the dog with it in the direction of its oscillation, a third slide arranged to oscillate transversely of the dog and of the second slide, and to carry them with it in the direction of its oscillation, crank arms arranged to drive said second and third slides respectively, the connections between the crank arms and the slides being adjustable to vary the throws of the slides, and means for driving the crank arms.

34. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog carried by the slide, a second slide arranged to oscillate transversely of the dog and to carry the dog with it in the direction of its oscillation, a third slide arranged to oscillate transwersely of the dog and of the second slide, and to carry them with it in the direction of its oscillation, and means for oscillating the second and third slides in amplitudes which may vary during the production of a work piece.

35. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog carried by the slide, a second slide arranged to oscillate transversely of the dog and to carry the dog with it in the direction of its oscillation, a third slide arranged to oscillate transversely of the dog and of the second slide. and to carry them with it in the direction of its oscillation, crank arms arranged to drive said second and third slides respectively, the connections between the crank arms and the slides being adjustable to vary he throws of the slides, automatic means for adjusting the said connections, and means for driving the crank arms.

36. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog mounted on the slide, a second slide arranged to oscillate transversely of the dog and to carry the dog with. it in the direction of its oscillation, a third slide arranged to oscillate transversely of the dog and of the second slide, and to carry them with it in the direction of its oscillation, crank arms arranged to drive said second and third slides respectively, blocks arranged to slide along the crank arms respectively, pins in the blocks connected with the second and third slides, and automatic means for adjusting the blocks along the crank arms.

37. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog mounted on the slide, a second slide arranged to oscillate transversely of the dog and to carry the dog with it in the direction of its oscillation, a third slide arranged to oscillate transversely of the dog and of the second slide, and to carry them with it in the direction of its oscillation, crank arms arranged to drive said sec ond and third slides respectively, blocks arranged to slide along the crank arms respectively, pins in the blocks connected with the second and third slides, and automatic means for adjusting the blocks along the crank arms comprising a spider connected with the pins.

38. In a pattern copying machine, model wheel and cutter carriages, a model shifting means comprising a mechanical axis of rota tion, a slide thereon having means to hold a model, a second slide arranged to oscillate transversely of the model holding means and to carry the model holding means with it in the direction of its oscillation, a third slide arranged to oscillate transversely of the model holding means and of the second slide and to carry them with it in the direction of its oscillation, crank arms arranged to drive said second and third slides respectively. blocks arranged to slide along the crank arms respectively, pins in the blocks connected with the second and third slides, and automatic means for adjusting the blocks along the crank arms comprising a spider connected with the pins, and model wheel and cutter carriages, said spider being operated by the progressive movement of one of the said carriages.

39. In a pattern copying machine, model wheel and cutter carriages, a model shifting means comprising a mechanical axis of rotation, a slide thereon having means to hold a model, a second slide arranged to oscillate transversely of the model holding means and to .carrythe model holding means with it in the direction of its oscillation, a third slide arranged to oscillate transversely of the model holding means and of the second slide and to carry them with it in the direction of its oscillation, and mechanism for oscillating the second and third slides at varying amplitudes comprising a member operated by the progressive movement of one of the carriages. 40. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, a slide thereon, a dog mounted on the slide, a second slide arranged to oscillate transversely of the dog and to carry the dog with it in the direction of its oscillation, a third slide arranged to oscillate transversely of the dog and of the second slide and to carry them with it in the direction of its oscillation, crank arms arranged to drive said second and third slides respectively, an eccentric mounted on the mechanical axis of rotation, eccentric straps mounted on the eccentric 90 apart for driving the crank arms, a block arranged to slide along each crank arm, a pin in each block, a slot in each slide running perpendicular to the direction of movement of the slide and embracing the corresponding pin, a spider mounted concentrically with the mechanical axis and having slots embracing the pins respectively, a model wheel carriage, and a connection between the spider and the model wheel carriage whereby the spider is driven by the movement of the model wheel along the model, to shift the pins along the crank ll. In a pattern copying machine, model wheel and cutter carriages, a dogshifting means comprising a mechanical axis of rotation, a slide thereon, a dog mounted on the slide, a member for operating the slide, a rocking member operated by the movement of one of the said carriages, a link having a pin and slot connection with the rocking member and the member for operating the slide, springs connecting the pins with the slot carrying members respectively, said springs transmitting the drive from the rocking memher to the operating member, one when the drive is in one direction, and the vother when i it is in the other, and stops limiting the movement of the operating member in either direction, the arrangement being such that the driving spring is thereafter distorted, allowing the corresponding pin to slide through its slot.

e2. A dog shifting means for a pattern copying machine comprising a cam having a circular part and another part of different curvature from the, circular part, and a camdriven member operated by the cam and act ing, when so operated, to shift the dog, said cam being rotated about the center ofcurvature of its circular part ancillary to the progressive formation of a work piece in the machine, and said cam being preliminarily a part concentric with the pivot thereof and a part not so concentric, and a cam-driven member eo-operating with the cam and arranged, when driven thereby, to operate the dog shifting means,

44. In a pattern copying machine, a model and block holding frame, a model wheel carriage and a cutter carriage, a dog shifting means on the said frame, a lever pivoted on the frame and connected with one of the carriages, said lever being arranged to be swung by the movement of said carriage, a cam mounted on the lever and having a part concentric with the pivot thereof and a part not so concentric, and a cam-driven member co operating with the cam and arranged, when driven thereby, to operate the dog shifting means, the cam being adjustable around the pivot of the lever to bring the junction between the concentric and the non-concentric parts into predetermined position.

45. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation, an olfsetable device thereon, a dog carried by the device, an oscillating member for moving the device, mechanism constructed and arranged to impart to said member movement during a rotation of the said axis which is substantially great as compared with the offsetting movement of the dog during the rotation, and means for continuously driving the member in a cycle having the same period as that of the said mechanical axis.

46. In a pattern copying machine, a dog shifting means comprising a mechanical axis ofrotation, an ofisetable device thereon, a dog carried by the device, an oscillating member for moving the device, mechanism constructed and arranged to impart to said member movement during a rotation of the said axis which is substantially great as compared with the olfsetting movement of the dog during the rotation, means for continuously driving the member in a cycle having the same period as that of the said mechanical axis, and means for varying the amplitude of the said movement in the said cycle.

47. In a pattern copying machine, a dog shifting means comprising a mechanical axis of rotation for a dog, two relatively movable crossed slides for shifting the dog, and means for imparting oscillatory motions to the two crossed slides.

48. In a pattern copying machine, a dog shifting means comprising a mechanical axis 5 of rotation for the dog, a slide thereon, a

dog mounted on the slide, two relatively movable crossed slides for shifting the firstnamed slide, and means for imparting oscillatory motions to the two crossed slides. In testimony whereof I have signed my name to this specification.

GEORGE F. RYAN. 

